where \(M\)  is \(M_{B^{\ast }} (1^-)\)  or \(M_{B^{\ast }_A}(1^+)\)  and \(M^{\prime }\)  is the radial excitation of \(M\) . The parametrization given
in Eq. (REF ) not only takes into account the correction to the single pole dominance, as suggested by dispersion relations [1]},
but also help us to determine the couplings of \(B^{\ast }\)  or \(B^{\ast }_{A}\)  to the \(BV\)  channel [2]}, [3]}, which is not the aim of this work.
Finally, using the above parameterization, the form factors can be expressed as:
\(V(q^{2})&=&\frac{V(0)}{(1-q^{2}/M^{2}_{B^{\ast }})(1-q^{2}/M^{\prime 2}_{B^{\ast }})},  \\A_{1}(q^{2})&=&\frac{A_{1}(0)}{(1-q^{2}/M^{2}_{B^{\ast }})(1-q^{2}/M^{\prime 2}_{B^{\ast }})}\left( 1-\frac{q^{2}}{M^{2}_{B} -M^{2}_{V}} \right), \\A_{2}(q^{2})&=&\frac{{\tilde{A}_{2}}(0)}{(1-q^{2}/M^{2}_{B^{\ast }})(1-q^{2}/M^{\prime 2}_{B^{\ast }})}-\frac{2M_{V}}{M_{B}-M_{V}}\frac{A_{0}(0)}{(1-q^{2}/M^{2}_{B})(1-q^{2}/M^{\prime 2}_{B})},\) 
